To find these patterns, data miners like Grossman first
chart their harvested facts on a scatter plot, an imaginary graph that has as many dimensions as the
number of personal characteristics being
evaluated, such as age, marital status, gender, and geography.
Editor's note: This story has been updated to reflect that the order of the apps
evaluated by Clareity Consulting in the
charts below does not reflect the
number of downloads or download ranking.